Boiler-circulator.



c. STEWART. BOILER CIRCULATOR.

APPLICATION FILED OCT-15, 1913.

Patented Mar. 14, 1916.

n15 col-Imam PLANOGRAPH c0., WASHINGTON, D. c

s AT

CHARLES STEWART, on NEW YORK, N. Y.

BOILER-CIRCULATOR.

Specification of Letters Patent.

Patented Mar. 14, 1916.

Application filed October 16, 1913. Serial No. 795,447.

- To all whom it may concern:

Be it known that I, CHAnLnsS'rEwART, a citizen of the United States, and a resident of the, borough of Brooklyn, county of Kings, cityand State of New York, have invented certain new and useful Improvements in Boiler-Girculators, of which the following is a description in such full, clear, and exact terms -as will enable persons skilled in the art to which it pertains to make and use the same. 7

My invention relates to an apparatus for automatically circulating the water in a steam boiler by bringing up cold water from the bottom of the same to the heated Water at the top thereby equalizing the temperature of the whole body of water. v

The principle governing the operation of the apparatus is that of steam condensation. At a point above-the water level the auto- -matic development of this principle is-utilized to bring about a reduction of pressure whereby a. quantity of cold water is'drawn from the bottom of the boiler. water then flows by gravity into the heated .-water at the top, the operation being rendered intermittent or pump-like by a float valve which controls the steam and is'actuated by the water of condensation.

The apparatus is attached to the exterior ofthe boiler as shown in the accompanying drawing which represents as an example the preferred embodiment of my invention and in which drawing Figure 1 is av plan view of the invention.

attached to the boiler, and Fig. 2 is a sectional view of the apparatus.

In this drawing, 10 represents the boiler, here shown as of the Scotch type.

11 is a pipe outside of the boiler 10 and opening into the bottom thereof to connect it with the reservoir 12 which is situated Well above the water level represented by the line cZ(Z. The tank or reservoir 12 may be supported on a bracket 13 attached to the boiler 10.

14 is a pipe which connects the upper par or steam space of the boiler 10 with the top of the tank 12, and 15 is a pipe which connects the bottom of the tank 12 with the boiler 10 at a point below the water levelcZd. A water-gage 16 is attached to the exterior of the tank 12. In the tank 12 is a float 17 attached to a rod 18 which reing-fro-m the boiler.

This cold ciprocates in a tube 19. This tube 19 extends through the top of the reservoir 12 and o-pensinto a chamber 20, this opening being commanded by a ball valve 21 which is unseat-ed by the upward movement of the rod 18.

22 is an opening in the tube 19 allowing communication with the interior of the reservoir or tank 12.

23 is a globe valve and 24 is a check valve both on the pipe 11, the check valve open- 25 is a globe valve and 26 is a Check valve both on the pipe 15, the check valve 26 opening into the boiler.

27 is a globe valve on the pipe 14.

The operation of the apparatus may be traced as follows:lVhen the boiler is not in operation the globe valves are closed and the pipe 15 is filled with water from a previous operation of the apparatus, as will be hereinafter described, and suflicient water remains in the tank 12 to elevate the float 17 to its upper position unseating the valve 21. Thereby communication between the tank 12 and the pipe 14 is established. To start the apparatus after the boiler is heated the valves 23, 25 and 27, which were heretofore closed, should be opened. Instantly the tank 12 -fills with steam admitted through the pipe 141 and past the open valve 21. The water in the pipe 11 then rises to the level (ld,' the water in the tank 12 recedes through the pipe 15 lowering the float 17 the water in the boiler 10, but the check valve 26 prevents any water from rushing into the tank 12 through the pipe 15 and the entire pressure is brought to bear upon the water in the pipe 11, this water being cold and from the bottom of the boiler 10. This Water rushes into the tank 12 responding to the reduction of pressure therein and reestablishes communication .with'the steam sect on of the boiler 10 from which steam; -again begins to flow into the'tank 12.,while the water in the tank flows by gravity through the pipe 15 back into the boiler.

From this it will be seen that by the op-- eration of the apparatus reductions of pres sure are brought about, in quick succession, in the tank 12 which, like the stroke of a single acting pump draw the water up in successive rushes through the pipe 11 and fill the tank 12, from which the water flows back into the boiler. In this way the cold water from the bottom of the boiler is being continually pumped up to the top and an even temperature maintained. 7

The pipe 11 is kept full of water to it very top as the check valve 24 prevents it from returning to the boiler 10. Thus when the pressure is reduced the water rushes into the tank 12 in a'shorter space of time than if the pipe 11 was partly empty.

When it is desired to stop the operation.

this manner a constant-circulation of the cold water at the bottom and the hot water at the top of the boiler is maintained thereby equalizing the temperature of the whole body of water, an advantage which will at once be apparent to a person skilled in the art to which'it pertains. I l 2 'Having thus described my invention, what I claim as new and desire'to secure by Letters Patent of the United States is e V Y 1. In a boiler circulator, the combination with theboiler; of means for allowing the cold water to be drawn from the bottom thereof and deposited in the hot water at the top, said means for drawing the cold water from the bottom and depositing itin the hot water at the top including a condenser chamber through Which the water passes by gravity and meanscfor intermittently filling the condenser chamber with steam from the steam space in the boiler. v V

r 2. In a boiler circulator, the, combination With'the boiler; of a condenser chamber, means for automatically drawing cold water from the bottom ofthe boiler to fill said" chamber, means for allowing said, water .to flow by gravity into the heated water at the top oftheboiler andat the same time per- 'mit theentrance of steam into the condenser -chamber.

3. In a boiler-circulator, the combination with the boiler; of a condenser chamber, means for automatically drawing coldwater from'the bottom-of the boiler to fill said chamber, means for allowing saidwater to flow by gravity into the heated water at the top of the'boiler and at the sametime permit the entrance of steam into the condenser,

chamber,said means including a pipe allow-1 a float in the tank to vary the position 'relative' to itsseat of the valve controlling the entrance of the steam.

In testimony whereof I have hereunto; signed my name in the presence of two with nesses. p t t 7 Q 7 CHARLES STEWART-. Witnesses: t

IsAAoB. OWENS, SYDNEXH. GIELLER P.

Copies of this patent may be obtained for five'oents each, by addressing the Commissioner of Patents, 1

WeshingtomD. G. l V 7 

